<template lang="">
    <div id="app">
        <p :style="{width:getWidth}" style="border: 1px solid black">我是子组件mycom2</p>
    </div>
</template>
<script>
export default {
    props: ["childWidth"],
    computed:{
        getWidth(){
            return this.childWidth + "px";
        }
    }
};
</script>
<style lang="">
    
</style>